relentlessness

From relentless +‎ -ness.

• IPA^(key): /ɹɪˈlɛntləsnəs/

• Audio (Southern England):

  (file)

relentlessness (uncountable)

1. The condition of being relentless.
   • 2012, Rachel Pepper, Transitions of the Heart:

     The more I learned about transkids, the more I grilled you, every day. I'm ashamed of my relentlessness, but I had to know.
     “Why do you want to be a boy?”
     “I don't know.”